Quote:
Originally Posted by Thecastle
I'm looking for advice bustedknuckles I just replaced my 105C thermostat with a "95C" thermostat to improve engine longevity.
I'm planning on taking the X5 to Banff next September about 2400 miles 1 way from Houston. I plan to tow my travel trailer, so I'll be putting considerable stress on my 2008 N62 X5 with 96K miles.
I was thinking of doing a cooling system refresh before the trip to ensure reliability while I still have cool weather in houston. What parts should I consider replacing? My X5 does not look to have its original water pump or upper radiator hose, so some parts have been replaced.
I've personally replaced the thermostat, heater control valve and radiator cap (still 2 bar). I've ordered a new expansion tank....
Do you think I should preventatively replace anything else before this road trip?
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It sounds like you are already in pretty good shape. The valley pan and coolant transfer pipe don't really fall under "preventative maintenance" but rather "replace when need-be". If you were really ambitious though you could do those. Both are well known weak points in the cooling system. So its just a matter of time before you have to replace them anyways.
If your water pump was replaced at some point you should be good there. You have the coolant expansion tank & cap, thermostat and heater control valve covered. All of the coolant hoses aren't a big concern as long as they aren't cracked or overly-hardened, so give them an inspection and leave them alone if there are no issues. The coolant hose o-rings are the real culprits when it comes to hoses leaking. They are cheap and easy to replace if you wanted to do them. Just a matter of unhooking all the hoses, swapping out the O-rings, then refilling and bleeding the system. Pretty easy. Maybe put some fresh coolant in if its due for a refresh.
Other than that, I think you are in good shape.
